---
typeId: term
recordId: stable-diagnostic-classification-code
fields:
  title: Stable diagnostic classification code
  definition: A stable machine-readable identifier for a portable Benac failure class or
    contract boundary. A stable diagnostic classification code supports
    interoperability, routing, conformance, policy, recovery, and fixture expectations.
    It is not an exhaustive root-cause explanation and does not replace raw diagnostic
    evidence.
  sourceDocument: user request 2026-05-04 diagnostic evidence consistency cleanup
  sourceSections:
    - 16. Terms and definitions changes
  order: 7803.1
  usage:
    - Use stable diagnostic classification codes for recognized supported failures. Use
      `diagnostic.unclassified` only when no more specific supported diagnostic
      classification code applies, and preserve origin-specific and raw evidence where
      practical and safe.
---
